在项目中使用Apache开源的Services Framework CXF来发布WebService，CXF能够很简洁与Spring Framework 集成在一起，在发布WebService的过程中，发布的接口的入参有些类型支持不是很好，比如Timestamp和Map。这个时候我们就需要编写一些适配来实行类型转换。
TimestampAdapter.java
package com.loongtao.general.crawler.webservice.utils; import java.sql.Timestamp; import javax.xml.bind.annotation.adapters.XmlAdapter; /**
* <java.sql.Timestamp类型转换> <功能详细描述>
* 在相应的字段前面 加上 @XmlJavaTypeAdapter(TimestampAdapter.class)
* @author Lilin
*/
public class TimestampAdapter extends XmlAdapter<String, Timestamp> { /**
* <一句话功能简述> <功能详细描述>
*
* @param time
* @return
* @throws Exception
* @see [类、类#方法、类#成员]
*/
public String marshal(Timestamp time) throws Exception {
return DateUtil.timestamp2Str(time);
} /**
* <一句话功能简述> <功能详细描述>
*
* @param v
* @throws Exception
* @see [类、类#方法、类#成员]
*/
public Timestamp unmarshal(String str) throws Exception {
return DateUtil.str2Timestamp(str);
}
}
DateUtil.java
package com.loongtao.general.crawler.webservice.utils; import java.sql.Timestamp;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.text.ParseException; import org.apache.log4j.Logger; /**
* <一句话功能简述> <功能详细描述>
*
* @author Lilin
* @version
* @see [相关类/方法]
* @since [产品/模块版本]
*/
public class DateUtil {
/**
* 注释内容
*/
private static final Logger log = Logger.getLogger(DateUtil.class);
/**
* 默认日期格式
*/
private static final String DEFAULT_FORMAT = "yyyy-MM-dd HH:mm:ss"; /**
* <默认构造函数>
*/
private DateUtil() {
} /**
* <字符串转换成日期> <如果转换格式为空，则利用默认格式进行转换操作>
*
* @param str
* 字符串
* @param format
* 日期格式
* @return 日期
* @see [类、类#方法、类#成员]
*/
public static Date str2Date(String str, String format) {
if (null == str || "".equals(str)) {
return null;
}
// 如果没有指定字符串转换的格式，则用默认格式进行转换
if (null == format || "".equals(format)) {
format = DEFAULT_FORMAT;
}
SimpleDateFormat sdf = new SimpleDateFormat(format);
Date date = null;
try {
date = sdf.parse(str);
return date;
} catch (ParseException e) {
log.error("Parse string to date error!String : " + str);
} return null;
} /**
* <一句话功能简述> <功能详细描述>
*
* @param date
* 日期
* @param format
* 日期格式
* @return 字符串
* @see [类、类#方法、类#成员]
*/
public static String date2Str(Date date, String format) {
if (null == date) {
return null;
}
SimpleDateFormat sdf = new SimpleDateFormat(format);
return sdf.format(date);
} /**
* <时间戳转换为字符串> <功能详细描述>
*
* @param time
* @return
* @see [类、类#方法、类#成员]
*/
public static String timestamp2Str(Timestamp time) {
Date date = new Date(time.getTime());
return date2Str(date, DEFAULT_FORMAT);
} /**
* <一句话功能简述> <功能详细描述>
*
* @param str
* @return
* @see [类、类#方法、类#成员]
*/
public static Timestamp str2Timestamp(String str) {
Date date = str2Date(str, DEFAULT_FORMAT);
return new Timestamp(date.getTime());
}
}
在具体的Java Bean 中，通过@XmlJavaTypeAdapter注解来通知CXF进行类型转换，具体请看ErrInfo中的属性timestamp的getter 和setter
/*
* Copyright (c) 2014-2024 . All Rights Reserved.
*
* This software is the confidential and proprietary information of
* LoongTao. You shall not disclose such Confidential Information
* and shall use it only in accordance with the terms of the agreements
* you entered into with LoongTao.
*
*/
package com.loongtao.general.crawler.webservice.vo; import java.io.Serializable;
import java.sql.Timestamp; import javax.xml.bind.annotation.adapters.XmlJavaTypeAdapter; import com.loongtao.general.crawler.webservice.utils.TimestampAdapter; /**
* @declare: 下载失败信息<br>
* @author: cphmvp
* @version: 1.0
* @date: 2014年9月22日下午3:47:26
*/
public class ErrInfo implements Serializable {
/**
*
*/
private static final long serialVersionUID = -5298849636495962631L;
private String ip; public String getIp() {
return ip;
} public void setIp(String ip) {
this.ip = ip;
} public String getUrl() {
return url;
} public void setUrl(String url) {
this.url = url;
} public int getArticleMediaId() {
return articleMediaId;
} public void setArticleMediaId(int articleMediaId) {
this.articleMediaId = articleMediaId;
} @XmlJavaTypeAdapter(TimestampAdapter.class)
public Timestamp getTimestamp() {
return timestamp;
} public void setTimestamp(Timestamp timestamp) {
this.timestamp = timestamp;
} private String url;
private int articleMediaId;
private Timestamp timestamp; }
这个时候CXF解析Java Bean ErrInfo的时候，解析到@XmlJavaTypeAdapter注解时候就会以TimestampAdapter这个适配器来进行Timestamp与String之间的转换。
Map：
用xstream将Map转换成String
package com.loongtao.general.crawler.webservice.utils; import java.util.HashMap;
import java.util.Map; import javax.xml.bind.annotation.adapters.XmlAdapter; import org.apache.cxf.aegis.type.java5.XmlType; import com.thoughtworks.xstream.XStream;
import com.thoughtworks.xstream.io.xml.DomDriver;
import javax.xml.bind.annotation.XmlAccessType;
import javax.xml.bind.annotation.XmlAccessorType; /**
* <数据模型转换> <Map<String,Object> 与 String之间的转换>
*
* @author Lilin
* @version
* @see [相关类/方法]
* @since [产品/模块版本]
*/
@XmlType(name = "MapAdapter")
@XmlAccessorType(XmlAccessType.FIELD)
public class MapAdapter extends XmlAdapter<String, Map<String, Object>> {
/**
* Convert a bound type to a value type. 转换JAXB不支持的对象类型为JAXB支持的对象类型
*
* @param map
* map The value to be convereted. Can be null.
* @return String
* @throws Exception
* if there's an error during the conversion. The caller is
* responsible for reporting the error to the user through
* {@link javax.xml.bind.ValidationEventHandler}.
*/
public String marshal(Map<String, Object> map) throws Exception {
XStream xs = new XStream(new DomDriver());
return xs.toXML(map);
} /**
* Convert a value type to a bound type. 转换JAXB支持的对象类型为JAXB不支持的的类型
*
* @param model
* The value to be converted. Can be null.
* @return Map<String,Object>
* @throws Exception
* if there's an error during the conversion. The caller is
* responsible for reporting the error to the user through
* {@link javax.xml.bind.ValidationEventHandler}.
*/
@SuppressWarnings("unchecked")
public Map<String, Object> unmarshal(String model) throws Exception {
XStream xs = new XStream(new DomDriver());
return (HashMap) xs.fromXML(model);
}
}